Phonographic sounder.



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UEirED STATES PATENT OFFICE.

GEORGE A. MOORE, OF BROOKLINE, MASSACHUSETTS, ASSIGNOR TO THE MOORETALKING SCALE COMPANY, OF BOSTON, MASSACHUSETTS, A COR- PORATION OFMAINE.

PHONOGRAPHIC SOUNDER.

SPECIFICATION formngfpart of Letters Patent No. 715,115, dated December2, 1902. i

' Application filed March 8, 1902. Serial No. 97,282. (No model.)

To a/ZZ whom it may concern:

Be it known that I, GEORGE A. MOORE, a citizen ofthe United States, anda resident of Brookline, in the county of Norfolk, State of 5ll/Iassachusetts,have invented certain new and useful Improvements inPhonographic Sounders, of which the following is a full, clear, andexact description. Y

The object of this invention is the construclo tion of an improvedphonographic sounder to be used in connection with the weighing-machineset forth in my companion application, Serial No. 76,850, therequirements of which are that the sounder must be capable of ad- 15justment in a line parallel with the face of the record-disk and afterwhich adjustment to some designated point shall be substantially fixedin position while the record-disk rotates in contact with thesounder-stylus.

Referring to the drawings forming a part of this specification, Figure 1is a sectional plan View on the line Y Y in Fig. 3. Fig. 2 is a sectionof the same on the line X X in Fig. 2. Fig. 3 is a sectional elevationon the z5 line Z Z in Fig. 1, this last figure being lout slightlyenlarged, while Figs. 1 and 2 are made of nearly double the usualdimensions of my sounder.

The reference-numeral 1 designates a por- 3o tion of a record-diskdesigned to be rotatedupon a shaft 2.

3 is a vertical rod longitudinally movable in a line parallel with theface of the recorddisk l. Suitably bolted to said rod by means 3 5 ofelbows 6 is an arm 7, carrying the sounderbox 10, containing the usualdiaphragm 11.

The stylus 20, cemented in the ordinary manner at one end to thediaphragm, is fulcrumed by means of the slender rod or pintle 4o 21,which is fixed in a suitable opening in the sounder-box by means of aset-screw 23 and is pinned in the stylus-head 1S, being laterally cutaway intermediate 0f the said box and head to give it transverseresilience, as

45 shown at 22.

Inasmuch as the sounder is designed to be substantially fixed inposition during the revolution of the record-disk and the latter isliable to be somewhat warped or otherwise so 5o out of true as to causeits face to vary in distance from the sounder, I have devised thefollowing construction for permitting the needle-point to accommodateitself to the record. This consists in jointing together the stylushead18 and the needle-socket 16, the pivot 19 being made vertical orparallel with the rod 3 and the face of the record-disk, so that theneedle-point can swing away from the said face, at the same time thejoint being made to fit so snugly that the vertical vibrationscommunicated to the needle-point by the record-grooves shall beperfectly transmitted through the stylus-head and stylus to thediaphragm. A suitable tension-sprin g 24, anchored at one end to thescrew 25 and at the other to the set-screw 17, by which the needle-pointis secured in the socket 16, serves to retain the needle-point againstthe recorddisk with a proper resilient pressure.

The sou nder bein g designed to be vertically varied in position for adistance nearly equal to the radius of the record-disk and at the sametime to communicate the vibrations of the diaphragm up to the fixedtrumpet 13, I form the sounder-box with a tube 12, standing upward to aheight approximately equal to the radius of the record-disk, and providethe lower end of the trumpet 13 with a tube 14 of nearly the same lengthand of a diameter to very loosely receive the tube 12, the dierence indiameters being such that there shall be no danger of the said partscontacting'and so causing a buzzing or rattling sound when the sounderis speaking.

Although the record-grooves on the disk are designed to be perfectlyconcentric, there is danger of their varying very slightly. Further, invertically positioning the sounder it is seldom possible to bring theneedle-point into exact alinement with a record-groove. It is thereforenecessary'to provide the sounderbox with a slight degree of verticalplay. To do this, I secure the sounder to the arm 5 in the followingmanner: Through enlarged holes 7in said arm I pass two screwsl, havingwashers 32 beneath their heads, and between said arm and the sounder-boxand also between said arm and said Washers I introduce soft-rubberWashers or cushions 30. Said screws being set down to quite firmly com-IOO press said cushions,- the sounder-box is held with a sufficientdegree of rmness, while at the'same time there is enough yield to therubber to permit the needle-point to slightly tilt the sounder, .and soput itself accurately in any record-groove to which it is presented.

Although, as my description above would seem 'to indicate, I may useseparate sections of rubber 30 between the arm 5 and the sou nder-boxand the screw-heads, yet I prefer to make such sections as part of acontinuous rubber washer or cushion extending from the sounder-boxthrough the openings 7 up to the Washers 32. The advantage of this isthat it is thereby made entirely impossible for the screws 3l to contactwith the sides of the openings 7 and so interfere with the perfection ofthe tones emitted by the sounder.

What I claim as myinvention,and for which I desire Letters Patent, is asfollows, to wit:

1. The combination with a phonographic sounder, of a stylus thereforhaving its needle-point pivoted thereto with a joint permitting iexurein a plane parallel with the diaphragm, and resilient means pressingsaid needle-point laterally in said plane, substantially as described.

2. The combination with a phonographic sounder, of a stylus and aneedle-point socket jointed together to swing in a plane parallel withthe sounder-diaphragm, and a tensionspring anchored to the sounder-boxand said socket to elastically draw said needle-point in said plane,substantially as described.

3. The combination with a phonographic sounder, of a stylus affixed atone end to the sounder-diaphragm, the centrally-thin pintle fixed in thesounder-box and also in the head of said stylus, the needle-point socketjointed to said head to swing in a plane parallel with said diaphragm,and the tension-spring terminally secured to said box and said socket,substantially as described.

4. The combination of a disk record, a sounder having its axis parallelwith the face of said disk and movable along said axis between thecenter and periphery of said disk, said disk and axis being vertical, asection of tubing rising from the sounder with its axis coincident withthat of the sounder and receiving acoustic vibrations therefrom, and afixed trumpet rising vertically from above said sounder with its smallerend loosely inclosing said section of tubing, substantially asdescribed.

5. The combination with a phonographic sounder, of an arm having anenlarged opening, a screw passing through said opening and fixed in thesounder-box, and resilient cushions between said arm and box and betweensaid arm and the screw-head, substantially as described.

6. The combination with the rod, of the arm rigidly projecting therefromand formed with a plurality of openings, a phonographic sounder, screwsfreely passing through said openings and ixed in the sounder-box,washers beneath the heads of said screws, and softrubber cushions onsaid screws between said box and washers, substantially as described.

In testimony that I claim the foregoing invention I have hereunto set myhand this 28th day of February, 1902.

GEORGE A. MOORE.

Witnesses:

A. B. UPHAM, CHAs. A. CoUoH.

